*4.6. FTIR Analysis of CS/PVOH/HNT and CS/PVOH/TO@HNT Films*

The interaction of pure HNT with CS/PVOH matrix in CS/PVOH/HNT films and TO@HNT hybrid nanostructure with CS/PVOH matrix in CS/PVOH/TO@HNT films were tested with FTIR analysis by using an FT/IR-6000 JASCO Fourier transform spectrometer (JASCO, Interlab, S.A., Athens, Greece) in the range of 4000–400 cm−<sup>1</sup> .
